//统一给前端返回的body响应
class result {
  constructor(ctx, msg = 'SUCCESS', code = 200, data = null, extra = null) {
    this.ctx = ctx
    this.msg = msg
    this.code = code
    this.data = data
    this.extra = extra
  }

  //统一返回json格式
  answer(){
    this.ctx.body={
        msg:this.msg,
        data:this.data,
        extra:this.extra//额外数据

    }
  }
}
module.exports=result
